Gas can be made to conduct a current if a moderately high voltage of ____ volts or more is applied to a gas at a low pressure inside a glass tube.
A)10
B)35
C)50
D)75

Question

Quizplus · Accepted Answer

This process is known as gas discharge or ionization. At low pressures, gas molecules can become ionized or charged when a voltage of at least 50 volts is applied. This causes the gas to conduct a current, and the resulting glow or discharge can be used in applications such as neon signs or fluorescent lighting. Choices A, B, and D are too low of a voltage to ionize the gas molecules, and therefore will not conduct a current.

Gas Can Be Made to Conduct a Current If a Moderately